Bug

Running ccproxy auth login copilot with the device code flow fails with:

TypeError: CopilotOAuthProvider.save_credentials() takes 2 positional arguments but 3 were given

Full traceback:

File ccproxy/auth/oauth/flows.py:378 in run
    return await provider.save_credentials(credentials, save_path)

TypeError: CopilotOAuthProvider.save_credentials() takes 2 positional arguments but 3 were given

Root Cause

Commit 9e44f249 added --file / custom save-path support to the OAuth flows and updated flows.py to call provider.save_credentials(credentials, save_path) with two arguments. ClaudeOAuthProvider and CodexOAuthProvider were updated to accept custom_path: Any | None = None, but CopilotOAuthProvider was not updated, leaving it with only one positional argument.

Fix

Add custom_path: Any | None = None to CopilotOAuthProvider.save_credentials() in ccproxy/plugins/copilot/oauth/provider.py. The parameter can be ignored for now (Copilot always uses its own storage), but the signature must match the interface expected by the flows.

Affected version

ccproxy-api 0.2.10 (latest)